[Bug lto/52778] New: gcc crashes with -flto on PA-RISC

[Bug lto/52778] New: gcc crashes with -flto on PA-RISC

[mikulas at artax dot karlin.mff.cuni.cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52778

             Bug #: 52778
           Summary: gcc crashes with -flto on PA-RISC
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mikulas@artax.karlin.mff.cuni.cz
              Host: hppa-linux-gnu
            Target: hppa-linux-gnu
             Build: hppa-linux-gnu


When compiling a specific version of the Links browser on PA-RISC with -flto, I
got a crash in lto1.

The crash happens on gcc-4.7.0 and gcc-4.7.0-RC-20120302. It doesn't happen
with gcc-4.6.[23].

I compiled gcc without optimization to rule out a possibility of miscompiled
compiler. The crash still happens.

I couldn't reduce the crash to a simple example --- even minor changes in the
source code resulted in the crash going away. So I'm uploading all the source
files and include files so that someone can reproduce the crash. The system is
Debian 5 on PA-RISC.

[Bug lto/52778] gcc crashes with -flto on PA-RISC

[mikulas at artax dot karlin.mff.cuni.cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52778

--- Comment #1 from mikulas at artax dot karlin.mff.cuni.cz 2012-03-29 18:25:43 UTC ---
I couldn't attach the file, so I placed in on
http://jikos.cz/~mikulas/gcc-crash-files.tar.bz2 . Download the archive, change
CC in the Makefile to point to your gcc-4.7.0 PA-RISC binary and run make. This
will reproduce the gcc crash.

[Bug lto/52778] gcc crashes with -flto on PA-RISC

[mikulas at artax dot karlin.mff.cuni.cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52778

--- Comment #2 from mikulas at artax dot karlin.mff.cuni.cz 2012-03-29 18:29:34 UTC ---
Created attachment 27038
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27038
gdb session analyzing the core file

This is the gdb session analyzing the crash. The crash happens in the function
"set_is_used" where the variable "ann" was NULL.

[Bug lto/52778] gcc crashes with -flto on PA-RISC

[mikulas at artax dot karlin.mff.cuni.cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52778

--- Comment #3 from mikulas at artax dot karlin.mff.cuni.cz 2012-03-29 18:46:17 UTC ---
BTW. I found that there is another bug #52776 with -flto crash at the same
place.

[Bug lto/52778] gcc crashes with -flto on PA-RISC

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52778

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2012-05-07
     Ever Confirmed|0                           |1

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-07 13:17:26 UTC ---
Can you try again after the fix for PR53195?

[Bug lto/52778] gcc crashes with -flto on PA-RISC

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52778

John David Anglin <danglin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |danglin at gcc dot gnu.org

--- Comment #5 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-23 04:04:48 UTC ---
I had a successful build using your test files with

dave@mx3210:~/debian/mpfr/mpfr4-3.1.0/build/tests$ gcc-4.7 -v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc-4.7.real
COLLECT_LTO_WRAPPER=/usr/lib/gcc/hppa-linux-gnu/4.7/lto-wrapper
Target: hppa-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.7.2-4'
--with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--disable-libssp --disable-libitm --enable-plugin --enable-objc-gc
--disable-libstdcxx-pch --enable-checking=release --build=hppa-linux-gnu
--host=hppa-linux-gnu --target=hppa-linux-gnu
Thread model: posix
gcc version 4.7.2 (Debian 4.7.2-4)